“R.U.R.” (Rossum’s Universal Robots) is a 1920 play by Czech author Karel Capek. Its big claim to fame is introducing the word “robot.” You can read it here. This is what Isaac Asmiov had to say about the play:
“Capek’s play is, in my own opinion, a terribly bad one, but it is immortal for that one word. It contributed the word ‘robot’ not only to English but, through English, to all the languages in which science fiction is now written.”